SN54LS243 datasheet(3/5 Pages) MOTOROLA

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AC WAVEFORMS

1.3 V

VIN

VOUT

tPLH

tPHL

1.3 V

VIN

VOUT

SW2

CL*

5 kΩ

SW1

VCC

TO OUTPUT

UNDER TEST

1.3 V

tPHL

tPLH

VOUT

tPHZ

1.3 V

tPZL

tPLZ

VOL

1.3 V

≥VOH

0.5 V

tPZH

1.3 V

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

≈ 1.3 V

0.5 V

≈ 1.3 V

SWITCH POSITIONS

5-395

FAST AND LS TTL DATA

SN54/74LS242

• SN54/74LS243

AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)

Symbol

Parameter

Limits

Unit

Test Conditions

Symbol

Parameter

LS242

LS243

Unit

Test Conditions

Symbol

Parameter

Min

Typ

Max

Min

Typ

Max

Unit

Test Conditions

tPLH

tPHL

Propagation Delay, Data to Output

9.0

CL = 45 pF,

RL = 667 Ω

tPZH

Output Enable Time to HIGH Level

CL = 45 pF,

RL = 667 Ω

tPZL

Output Enable Time to LOW Level

tPLZ

Output Disable Time from LOW Level

CL = 5.0 pF,

RL = 667 Ω

tPHZ

Output Disable Time from HIGH Level

CL = 5.0 pF,

RL = 667 Ω

SYMBOL

SW1

SW2

tPZH

Open

Closed

tPZL

Closed

Open

tPLZ

Closed

tPHZ

Closed

SN54LS243 Datasheet(PDF) 3 Page - Motorola, Inc

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